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Q ST QUA TAT ALIT US O TY IN OF W N IN WA NDIA ATER A- 2 R ...

Q ST QUA TAT ALIT US O TY IN OF W N IN WA NDIA ATER A- 2 R ...

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TOTAL COLIFORM(MPN/100ml)100000100001000100101KherghatDibrugarh Nimatighat DhentukhapaharPanduJogijhoga KacharighatChandrapur SualkuchiD DhubriMinMaxMean<strong>WA</strong>TER <strong>QUA</strong>LI<strong>TY</strong> <strong>OF</strong> RIVER BRAHMAPUTRA‐2011300 300 12800 9300 35001149 1561 7800 300 3002900 3500 15000982 1545 2225360 0 3001500 730 4300740 363 18373001500720FECAL COLIFORM(MPN/100ml)10000 <strong>WA</strong>TER <strong>QUA</strong>LI<strong>TY</strong> <strong>OF</strong> RIVER BRAHMAPUTRA‐20111000100101KherghatDibrugarhMin 0 0Max 360 360Mean 180 142Nima Dhentigha ukhat paharPandu0 0 0JogijhogaKacharighatChandrapurSualkuchi0 0 0 0Dhubri700 1100 1100 730 360 300 1500 300124 160 386 154 220 200 6000 2000CONDUCTIVI<strong>TY</strong> (µmhos/cm)1000<strong>WA</strong>TER <strong>QUA</strong>LI<strong>TY</strong> <strong>OF</strong> RIVER BRAHMAPUTRA‐20111100101Kherghat DibrugarhNimatighatDhenukhapaharPanduJogijhoga KacharighatChandrapurSualkuchi DhubriMinMaxMean911751289419714871205151112210152108 238 159 68681941242061561152021531332091691131881476.2.1. Water Quality oftributary stream DhansiriThe water qualityof River Dhansiri is conforming to water quality criteria withrespect to pH. BOD is observed in the range of 0.4 to 6.8 mg/l. BOD is notmeeting the desired criteria inRiver Dhansiri at Nuton Basti, (6.8mg/l) and Townboundary bridge, Diphu Road (5.6 mg/l), Nagaland, and Dhansiri at NagalandAssamBorder, Dimapur (3.6 mg/l). DO ranges from 0.2 to 7.6 mg/l. RiverDhansiri is not meeting the criteria limit for DO except Dhansirii at Golaghat(5.8mg/l),Assam. Total Coliform(TC) andFaecal Coliform count is meetingthecriteria limit. Thewater quality of Dhansiri and its tributary streams is presentedin Annexure-I Table 6.2.6.2.2. WaterQuality of tributary streams Subansiri, Kharsang, Burhidihing,Pagldia, Digboi,Jai Bharali, Kolong, Manas, Disang, Jhanji,Bhogdoi, MoraBharali, Borak, Bharalu, Deepar Bill & KathakalThe Water quality of other tributary streams Subansiri, Kharsang, Burhidihing,Pagldia, Digboi, Jai Bharali, Kolong, Manas, Disang, Jhanji, Bhogdoi, MoraBharali, Borak, Bharalu, Deepar Bill & Kathakal is meeting the desired criteriafor Conductivity,Faecal Coliform,Totalcoliform and DO whereas low value ofDO isobserved at River Deepar Bill, Assam (2.3mg/l) and Disang at Gundamghat,Assam(3.5mg/l) .79

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